A solution from eviShine will be part of the construction of the first real energy neutral apartments: BOLIG+
With the construction of BOLIG+ apartments, the property company Realdania By & Byg has developed a lighthouse project within the area of energy-optimized apartments in Denmark. The buildings are being built in Søborg and will be the first real energy neutral apartments in Denmark. To be able to document the knowledge about the patterns of consumption, a constant amount of data will be collected from the property and the apartments.Read More
BOLIG+ was initiated in connection with EnergyCamp05, where some representatives from the construction sector were given 36 hours to solve the task: ”How can we develop energy-efficient housing for the world’s growing population.” The conclusion from the group was that there were significant energy saving opportunities in the construction industry in Denmark. Denmark also has products, knowledge, competence, and opportunities to utilize and promote this potential and become an international center of knowledge. On account of discussions and visions at EnergyCamp, the desire to construct a real energy neutral building emerged. Measurements and collection of knowledge, therefore, had to be a part of the project.
eviShine makes complicated distribution account
At the construction in Søborg, which consist of 10 apartments, solar panels are installed both on the roof, on the facade, and on the gable, as part of the architecture. eviShine has installed the meters that measure the consumption of electricity and hot/cold water in each apartment. eviShine has also been advisory and prepares energy and distribution accounts.
It is a very complicated distribution account due to the danish law, which says that electricity from solar panels must be settled hour by hour. It means that the power generated must be consumed within an hour. If it does not, it has to be sold to other consumers at a price of 0.50 DKK. per Kilowatt. The power that is not generated by the solar panels is purchased at 2.50 DKK. per Kilowatt. It means that the distribution accounts must keep an eye on all these transactions to provide a precise picture.
The idea is that the eviShine system will expand so that the residents are encouraged to use solar energy and to benchmark the energy consumption and utilization of solar energy of the neighbours/other residents.
Jørgen Søndermark, architect at Realdania By & Byg, and project manager at BOLIG+ states: ”We chose eviShine at the time because it was one of two companies that where recommended by our engineer. We chose eviShine because they were able to provide us with a solution that also worked visually. With all the meters we have, it’s essential that it looks good and at the same time can compile the complicated distribution accounts.”
Battery collects surplus of energy from solar panel
To be able to use more of the cheaper solar cell power, eviShine has installed a Visblue battery. The battery stores the energy that is not being used immediately and has increased the amount of power from its own solar panel from 25% to 50%. A bigger battery is required if it exceeds 50%; however, that would not be profitable compared to the price of the battery.
Heat regaining on sewage
A solution has also been established to achieve heat regaining on the consumption of hot water. eviShine has installed meters that measure the achieved heat regaining which is obtained by reusing the heat from the water that is derived from, for example, hot baths. The heat regaining is used for heating the hot water and has an unusually high effect, which means that the investment is quickly repaid.
Future knowledge of energy
With the buildings in Søborg and the knowledge that is provided by the distribution accounts, it is preferred that the collected knowledge should become a part of the DGNB system. A collaboration with Green Building Council has been initiated, and when accounts of the first two years’ are available in the summer of 2018, the conclusion can be made.
Read more about the Søborg project here: http://www.boligplus.org/
Fotos: Kira Krøis Ursem / Realdania By & Byg
Illustration: Realdania By & Byg